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Single crystal X-ray diffraction has established the absolute configuration of the indole alkaloids from Vinca erecta such as akuammiline-o-acyl derivative of akuammine with a 3D stable polycyclic framework. Crystal data for C24H28N2O5: orthorhombic, space group P212121 (no. 19), a = 7.349(3) Å, b = 16.099(5) Å, c = 17.323(5) Å, V = 2049.5(12) Å3, Z = 4, T = 293(2) K, μ(CuKα) = 0.789 mm-1, Dcalc = 1.376 g/cm3, 1742 reflections measured (7.496° ≤ 2Θ ≤ 119.792°), 1742 unique (Rsigma = 0.0374)doi:10.5155/eurjchem.10.4.345-349.1898 fatcat:k2a77fn6gzesbipczte4jqxsba